Start working on settings UI

SettingsWindow/AboutSettingsPanel.xaml

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+<windows:CategoryPanelBase x:Class="WorldClockStatusWindow.SettingsWindow.AboutSettingsPanel"
+                                  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                                  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                                  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+                                  xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+                                  xmlns:properties="clr-namespace:WorldClockStatusWindow.Properties"
+                                  xmlns:worldClockStatusWindow="clr-namespace:WorldClockStatusWindow"
+                                  xmlns:windows="clr-namespace:ChrisKaczor.Wpf.Windows;assembly=ChrisKaczor.Wpf.Windows.CategoryWindow"
+                                  mc:Ignorable="d"
+                                  d:DesignHeight="150"
+                                  d:DesignWidth="300">
+    <Grid>
+        <StackPanel windows:Spacing.Vertical="10">
+            <TextBlock Text="{x:Static properties:Resources.ApplicationName}"
+                       FontWeight="Bold" />
+            <TextBlock Text="{Binding Source={x:Static worldClockStatusWindow:Program.LocalVersion}, StringFormat={x:Static properties:Resources.Version}}"
+                       Name="VersionLabel" />
+            <TextBlock Text="Chris Kaczor" />
+        </StackPanel>
+    </Grid>
+</windows:CategoryPanelBase>

SettingsWindow/AboutSettingsPanel.xaml.cs

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+namespace WorldClockStatusWindow.SettingsWindow
+{
+    public partial class AboutSettingsPanel
+    {
+        public AboutSettingsPanel()
+        {
+            InitializeComponent();
+        }
+
+        public override string CategoryName => Properties.Resources.optionCategoryAbout;
+    }
+}

SettingsWindow/GeneralSettingsPanel.xaml

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+<windows:CategoryPanelBase x:Class="WorldClockStatusWindow.SettingsWindow.GeneralSettingsPanel"
+                                  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                                  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                                  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+                                  xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+                                  xmlns:properties="clr-namespace:WorldClockStatusWindow.Properties"
+                                  xmlns:windows="clr-namespace:ChrisKaczor.Wpf.Windows;assembly=ChrisKaczor.Wpf.Windows.CategoryWindow"
+                                  mc:Ignorable="d"
+                                  d:DesignHeight="300"
+                                  d:DesignWidth="300">
+    <StackPanel windows:Spacing.Vertical="10">
+        <CheckBox Content="{x:Static properties:Resources.startWithWindowsCheckBox}"
+                  IsChecked="{Binding Source={x:Static properties:Settings.Default}, Path=AutoStart}"
+                  Click="OnSaveSettings" />
+    </StackPanel>
+</windows:CategoryPanelBase>

SettingsWindow/GeneralSettingsPanel.xaml.cs

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+using ChrisKaczor.Wpf.Application;
+using System.Windows;
+using WorldClockStatusWindow.Properties;
+
+namespace WorldClockStatusWindow.SettingsWindow;
+
+public partial class GeneralSettingsPanel
+{
+    public GeneralSettingsPanel()
+    {
+        InitializeComponent();
+    }
+
+    public override string CategoryName => Properties.Resources.optionCategoryGeneral;
+
+    public override void LoadPanel(Window parentWindow)
+    {
+        base.LoadPanel(parentWindow);
+
+        MarkLoaded();
+    }
+
+    private void OnSaveSettings(object sender, RoutedEventArgs e)
+    {
+        SaveSettings();
+    }
+
+    private void SaveSettings()
+    {
+        if (!HasLoaded) return;
+
+        Settings.Default.Save();
+
+        Application.Current.SetStartWithWindows(Settings.Default.AutoStart);
+    }
+}